"CO2 in the atmosphere just exceeded 415 parts per million for the first time in human history" | "Annual CO 2 mole fraction increase ppm for 1959—2007" |
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"Present-day CO 2 emissions from volcanoes" | "Water vapor feedback and global warming" |
"The NOAA Annual Greenhouse Gas Index AGGI - An Introduction".
"Global Greenhouse Gas Emissions Data" | "Contributions to accelerating atmospheric CO 2 growth from economic activity, carbon intensity, and efficiency of natural sinks" |
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Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change | "Frequently asked global change questions" |